c语言中list(链表)的具体实现，加表头，表尾，删除等功能，附具体例子-c language list (list) of the concrete realization, plus the table header, footer, delete and other functions, with a concrete example of

sidebar', 'before_widget' => '<div id="%1$s" class="widget %2$s">', 'after_widget' => '</div>', 'before_title' => '<h4 class="widget-title">', 'after_title' => '</h4>',